The thyristor turn-off requires that the anode current
In case of class A type commutation or load commutation with low value of R load the
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The class A commutation or load commutation is possible in case of
In case of class B commutation or resonant-pulse commutation with L = 5 μH and C = 20 μC with initial voltage across the capacitor (Vs) = 230 V. Find the peak value of resonant current.
In case of class B commutation or resonant-pulse commutation with L = 5 μH and C = 20 μC with the initial voltage across the capacitor (Vs) = 230 V. Find the conduction time for auxiliary thyristor.
An SCR is connected in series with L = 5 mH and C = 20 μF. Find the resonant frequency of the circuit.
The type of commutation when the load is commutated by transferring its load current to another incoming thyristor is
The type of commutation in which the pulse to turn off the SCR is obtained by separate voltage source is
The natural reversal of ac supply voltage commutates the SCR in case of
___________ commutation technique is commonly employed in series inverters.
For the circuit shown in the figure below,
C = 4 pF
L = 16 μH
Vs = 200V
The capacitor voltage after the SCR is self commutated is
For the circuit shown below,
The maximum value of current through thyristors T1 & TA can be given by
For the circuit shown in the figure below,
C = 4 pF
L = 16 μH
Vs = 200 V
The peak thyristor current is
For the circuit shown in the figure below, ___ type of commutation would take place for the SCR (THY1)
For the circuit shown in the figure below
R1 = 50 Ω, R2 = 100 Ω, Vs = 100 V. At the time of turn-on of the SCR, initial thyristor current is
___________ commutation is usually used in phase-controlled rectifiers
Below is the circuit of a resonant-pulse commutation, the maximum voltage to which the capacitor C charges is
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5 videos|50 docs|46 tests
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